Strictly speaking, mitosis and meiosis are
divisions of the
a. nucleus.
b. cytoplasm.
c. chromosomes.
d. nucleus and chromosomes.
e. nucleus, cytoplasm, and chromosomes.
D
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In animal cells, microtubules grow from
A. the plasma membrane. B. the outer membrane of the nuclear envelope. C. centrosomes containing centrioles. D. dimerization centers located throughout the cytosol. E. the tips of the chromosomes.
Organisms that make their own organic compounds from inorganic substances are called
A. animals. B. animorphs. C. autotrophs. D. heterotrophs.
A population with a large fraction of pre-reproductive individuals is common in _-developed countries; this population will most likely in size.
A. more; decrease B. less; increase C. less; decrease D. more; increase
Relatively little of the earth's suitable land has been converted to croplands, pastures, or rangelands.
a. true b. false